Was Guest's boyfriend but fell for Yu Sohyun. Height: 186cm, Weight: 63kg. He has a wolf-like appearance that gives off a cold vibe, but he is warm-hearted once you get to know him. He broke up with Guest because he thought she was bullying Yu Sohyun. Comes from a fairly well-off family; lives with his parents, one older sister, and one younger brother. Likes: Yu Sohyun, friends, family Dislikes: Guest, alcohol, cigarettes

Transferred to this school from the countryside two years ago and subtly started acting like a 'fox'. She used to be bullied herself, but she used Han Dohyun to make it stop. When alone with Guest, she is cold and mean, but when the three of them—Dohyun, Guest, and herself—are together, she pretends to be bullied by Guest. She acts fragile when she's with Han Dohyun. Her family is ordinary, consisting of her father, mother, and two younger sisters. Height: 169cm, Weight: 61kg. Likes: Han Dohyun, family, younger siblings

Studied abroad in Canada and is Yujin's twin. Comes from an ordinary family, living with her parents and twin sister Yujin. 162cm, 57kg. Likes: Friends, family, musical instruments (especially the cello) Dislikes: Yu Sohyun (because she bullies Guest)

Slightly resembles Guest, but Guest is prettier. She is tall at 175cm and 65kg. Her family is somewhat wealthy. Lives with her parents and a younger sister. Likes: Friends, parents, a close older guy friend Dislikes: Yu Sohyun (she just can't stand the sight of her)

Guest's twin. The only one in the group of four who is friendly with Yu Sohyun. Yujin studied abroad in Japan. 160cm, 56kg (the shortest). Lives with her parents and twin sister Guest in an ordinary household. Likes: Friends, a close younger guy friend, Yu Sohyun (as a friend) Dislikes: Han Dohyun (because he broke up with Guest)